An occasional driver should only drive as many occasional miles as he might occasionally want to drive. The term Occasional driver is not indicative of how many miles they might drive but rather how often they may drive, there is no specific legal definition for an occasional driver. Most Insurers develop there own guidelines to determine if some fits the definition of an occasional driver. Generally an occasional driver would drive your vehicle no more than a few times a year. If they drive regularly once a week or regularly once a month, or once every 6 weeks, then they are a regular driver. By the very definition of the term, an occasional driver would not know how often they are going to drive. Any type of planned or scheduled use would define them as a regular driver.
You would be added as an occasional driver after one is licensed. When divorced it is up to either parent to add them. If they will be driving both parents cars then they will need to be on both policies.
Under the listed drivers portion of the policy.
about $650, the same amount of your mum per hour
It really depends on what your insurance policy is.
Probably, but you should check with the agent or see if there is a clause in the policy that covers it.
No, your insurance will cover the occasional driver as long as they are licensed
yes, and if you are put as an occasional driver on their car it's cheaper.
Generally speaking if there is one car per person in the household then everyone is a primary driver. If there are fewer cars (2 cars 3 drivers) then one person can always be an occasional operator.
The vehicle owner should have a policy on the vehicle. If you are an occasional permissive driver of their vehicle there would likely be coverage.
Basically the definition is as follows. Any person who has regular access to your vehicle would not be considered an occasional driver. If your son has insurance on his own vehicle then that coverage would follow him to a borrowed vehicle and there would be no need for this question. If he has no other auto or auto insurance and / or his drivers license reflects your home address, then obviously he is an authorized regular driver of your vehicle. Where the person lives, At home, not at home, does not determine his status as an occasional or regular driver. The question is does he have regular access to the vehicle in question whenever he needs or wants to drive. The best way to prove that he is an occasional driver would be to demonstrate that he owned his own vehicle at the time of the accident, that his vehicle was insured at the time. that the address on his drivers license reflects an address other than yours and that his vehicle was registered at his home address which is also not your address. State laws require that Drivers Licenses and Vehicles be registered at the address of the owner. If he had no vehicle, no insurance, and/or had a vehicle or drivers license registered at your address then it would likely be impossible to prove that he is only an occasional driver.
Because, unless your car is off-limits to him, he would be considered a regular, not occasional, driver, who needs to be on your insurance to be covered.